import type { Actor, IAction, IActorOutput, IActorTest } from './Actor';
import type { IActorReply, IBusArgs } from './Bus';
import { Bus } from './Bus';
/**
* A bus that indexes identified actors,
* so that actions with a corresponding identifier can be published more efficiently.
*
* Multiple actors with the same identifier can be subscribed.
*
* If actors or actions do not have a valid identifier,
* then this will fallback to the normal bus behaviour.
*
* @see Bus
*
* @template A The actor type that can subscribe to the sub.
* @template I The input type of an actor.
* @template T The test type of an actor.
* @template O The output type of an actor.
*/
export declare class BusIndexed, I extends IAction, T extends IActorTest, O extends IActorOutput> extends Bus {
protected readonly actorsIndex: Record;
protected readonly actorIdentifierFields: string[];
protected readonly actionIdentifierFields: string[];
/**
* All enumerable properties from the `args` object are inherited to this bus.
*
* @param {IBusIndexedArgs} args Arguments object
* @param {string} args.name The name for the bus
* @throws When required arguments are missing.
*/
constructor(args: IBusIndexedArgs);
subscribe(actor: A): void;
unsubscribe(actor: A): boolean;
publish(action: I): IActorReply[];
protected getActorIdentifier(actor: A): string;
protected getActionIdentifier(action: I): string;
}
export interface IBusIndexedArgs extends IBusArgs {
actorIdentifierFields: string[];
actionIdentifierFields: string[];
}